1.

int(x+1)/(sqrt(1+x^(2)))dx=...

Answer»

`SQRT(1+x^(2))+TAN^(-1)x+c`
`sqrt(1+x^(2))-log [x+sqrt(1+x^(2))]+c`
`sqrt(1+x^(2))+log [x+sqrt(1+x^(2))]+c`
`sqrt(1+x^(2))+log (secx+tanx)+c`

ANSWER :C


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